The utility model relates to the technical field of
oxygen generators, in particular to a low-temperature preheating type
oxygen generator which comprises a shell, an adsorption
barrel, a temperature sensor, a controller, a compressor, a gas inlet pipeline and a gas distribution valve
assembly. The controller is in
signal connection with the compressor, the temperature sensor and the gas distribution valve
assembly, the temperature sensor detects the temperature of the adsorption cylinder, the controller receives a temperature value fed back by the temperature sensor and controls opening and closing of the gas distribution valve
assembly, and when the temperature is smaller than T, the controller controls the compressor to input pressurized hot gas into the adsorption cylinder; the ventilation port of the gas distribution valve assembly is partially opened and closed to circularly heat and exhaust the adsorption cylinder, so that the temperature of the adsorption cylinder is increased; when the temperature is larger than or equal to T, the controller controls the compressor and the gas distribution valve assembly to input pressurized gas into the adsorption
barrel, and
pressure swing adsorption oxygen production is conducted. On the premise that a heater is not additionally arranged, the temperature of the adsorption
barrel in the low-temperature environment is increased, then the adsorption and
desorption performance of an adsorbent is improved, and the oxygen generation performance of the oxygen generator is conveniently improved.